Sources: UFC Vet Irvin Allegedly Tests Positive for Steroids

Irvin allegedly tested positive for Epitrenbolone, also known as
Trenbolone Metabolite. Trenbolone, taken by intramuscular
injection, is a steroid typically used on livestock to increase
appetite and muscle growth.

Prior to being submitted by Oliveira on Dec. 2, Irvin had lost
three of four bouts, including a trifecta of fights in the UFC.
Irvin began his UFC career in 2006, compiling a 3-1 record by
besting the likes of Terry Martin and Houston
Alexander. “The Sandman” then stepped up to take on longtime
middleweight kingpin Anderson
Silva in 2008. After being knocked out in just 61 seconds,
Irvin allegedly tested positive for banned painkillers.

The 32-year-old's final two bouts in the Octagon also resulted in
defeat. Irvin made his middleweight debut for the promotion last
March, suffering a TKO loss to Alessio
Sakara. Moving back up to light heavyweight, the American was
submitted by Croat Igor
Pokrajac in the first round of their UFC Live 2 contest in
August.

Since losing to Oliveira and allegedly testing positive for
Epitrenbolone, Irvin has competed once in 2011, registering a
no-contest on Jan. 29 after hitting his downed opponent with an
illegal knee at a Gladiator Challenge event at the Elko Indian
Colony Gymnasium in Elko, Nevada. Currently, the light heavyweight
has a fight scheduled for March 11 against former UFC foe Houston
Alexander at Shark Fights 14.